Vertical mill installation instructions - Haas Automation, Inc.

8. Electrical power must be phased properly to avoid damage to your equipment. The Power Supply
Assembly PC board incorporates a “Phase Detect” circuit with neon indicators, shown below. When the
orange neon is lit (NE5), the phasing is incorrect. If the green neon is lit (NE6), the phasing is correct. If both
neon indicators are lit, then you have a loose wire; check the connections. Adjust phasing by swapping L1
and L2 of the incoming power lines at the main circuit breaker.
PHASE DETECT
(FOR 3PHASE ONLY)
PASS FAIL
NE6
WARNING!
All power must be turned off at the source prior to adjusting phasing.
9. Turn off the power, close the door, lock the latches, and turn the power back on.
10. Remove the key from the control cabinet and give it to the shop manager.
installation pRoceduRe FoR exteRnal 480v tRansFoRMeR
Introduction
The external transformer adds to overall machine reliability and performance; however it does require extra
wiring and a place to locate it. The external transformer provides electrostatically shielded isolation. This type
of transformer acts to isolate all common mode line transients and improve EMI conducted emissions.
The external transformer has a 45 KVA rating. It is a 480V 60Hz only transformer.
Installation
The transformer should be located as close to the machine as possible. The input and output wiring of the
transformer should conform to the local electrical codes and should be performed by a licensed electrician.
The following is for guidance only, and should not be construed to alter the requirements of local regulations.
The input wire should not be smaller than 6 AWG for the 45KVA transformer. Cable that runs longer than 100"
will require at least one size larger wire. The output wire size should be 4 AWG.
The transformer is 480V to 240V isolation transformers with delta-wound primary and secondary windings.
The primary windings offer 7 tap positions, 2 above and 4 below the nominal input voltage of 480V.
The primary side should be wired as follows:
16 Installation 96-0284A
© Haas Automation June 2010
NE5